Notebook entry + little question )) Yesterday I watched another episode of my favourite american soap opera. The heroine felt nauseous and had to vomit. After that another character commented on that that she had to barf (he said that among his friends in the office). I understand that that was a slang word for "vomit". So, a question came up to my mind. There are several words for "vomit" that I already know: vomit, throw up, puke, barf. Can you please tell me which of them can we use in which situations? Which of those are suitable for using among friends in the office, which I can use while talking to my boss, which are not appropriate at all? Thanks )